Mounting for rock-drills



W. A. SMlTH.

MOUNTING FOR ROCK DRILLS.

APPLICATION FILED MAR, 22. I920.

Patented July 20, 1920,

g QtwENTOR ,4 ATTO NEY UNITED STATES PATENT OFFICE.

WILLIAM A. SMITH, F EASTON, PENNSYLVANIA, ASSIGNOR T0 INGERSOLL-RANDCOMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

MOUNTING FOR ROCK-DRILI|S.

Specification of Letters Patent.

Patented July 20, 1920.

To all whom it may concern:

Be it known that I, WILLIAM A. SMITH, a citizen of the United States,residing at Easton, in the county of Northampton and State ofPennsylvania, have invented a certain new and useful Improvement inMountings for Rock-Drills, of which the followin" is a specification.

his invention relates to an improved mounting for rock drills by meansof which the drill body or casing may be conveniently secured upon acradle adapted to be slidably mounted in a drill shell of the usual orsuitable construction.

The objects of the invention are to enable the drill body or casing tobe simply and rigidl mounted and capable of being remove when desiredwith the minimum of parts requiring adjustment and afford simple means bwhich continuous side bolts are utilize for clamping the front and backheads of the rock drill to the cylinder casing and for clamping said 0linder casingand heads to the guide orcrad e, thus obviating separatebolts for the two functlons.

The invention is illustrated in one of its preferred forms in theaccompanying draw m in whichto a cradle igure 1 is a side elevation ofso much of a rock drill as will serve to show the invention, and

Fig. 2 is a detailed perspective view of the guide or cradle.-

Referring to the drawings, Are resents a drill cylinder casing for adrill w ich may be of the hammer type for illustrative puring the frontand back heads to the cylinder casing and separate means have beenutilized for securin the parts ofthe drill casing In accordance with thepresent invention however, I have designed an improved and simplifiedconstruction in which one set of side bolts clamp the parts of flangesor guides G for slldably engaging a shell, and is also provided with theoutwardly extending pairs of arms H and J within which the drill body orcasing is adapted to lie in assembled position as shown in Fig. 1. Thearms H and J are provided with apertures K to receive the side bolts Lhaving the heads 0 and tightening nuts P.

.The front head C is formed with-holding lugs Q at each side, those onone side onl being shown for simplicity, and the bac head E is alsoprovided with holding lugs R at each side, the bolts L being adapted topass through said hhgs when the a rtures K in the guide arms and J are ained with said sets of holdin lugs. The cylinder casing is preferablyormed with guide lu s S at each side in alinement with the hol ing lug?on the front and back heads.

hen the parts are assembled as in Fig. 1 and the bolts are tightened,the cylinder casing, front and back heads and the cradle are allsecurely clamped to ether. For convenience of assembling an demountinthe guide arms H preferably lie forward y of the holding lugs Q and theguide arms J preferably lie forwardly of the holding lu s R.

I claim- In a rock drill, a cylinder casing havin front and back headsholding lugs at eac side of the front and back heads, guide lugs at eachside of the cylinder casing in line with the said holding lugs, a cradlefor the rock drill provided with a body portion having guides and alsohaving supporting arms adapted to lie op site the said holding lugs 'onthe front and ack heads, and continuous side bolts adapted to extendthrou h the said supportin arms and holdin an guide lugs at each si e ofthe rock dril and means for tightenin the bolts to clamp the cylindercasin an front and back heads to each other an to the said cradle.

In testimony whereof I have hereunto set my hand.

WILLIAM A. SMITH.

